Method for observing Doppler-free hot-band transitions
Abstract
A novel spectroscopic method for highly sensitive detection of hot-band transitions based on infrared-infrared double resonance in a molecular beam was successfully demonstrated. The intensity of the infrared transitions from a vibrationally excited state is enhanced by two orders of magnitude by resonant laser pumping. The hot-band transitions are identified in connection with the assigned transitions in the fundamental band. Doppler-free spectral lines are observed. The experiment was carried out on the 2 v 3← v 3 transitions of CH3F with CO2 laser pumping and probing.
- Publication:
-
Applied Physics
- Pub Date:
- March 1981
- DOI:
- Bibcode:
- 1981ApPhy..24..219M
- Keywords:
-
- Infrared Lasers;
- Laser Spectroscopy;
- Molecular Beams;
- Molecular Spectroscopy;
- Optical Transition;
- Resonance Lines;
- Carbon Dioxide Lasers;
- Doppler Effect;
- Laser Pumping;
- Line Spectra;
- Molecular Energy Levels;
- Molecular Excitation;
- Stark Effect;
- Vibrational Spectra;
- Instrumentation and Photography;
- PACS 33.40 - 34.50 - 35.20;
- 33.40;
- 34.50;
- 35.20